Index: trunk/ppStack/src/ppStackSources.c
===================================================================
--- trunk/ppStack/src/ppStackSources.c	(revision 26076)
+++ trunk/ppStack/src/ppStackSources.c	(revision 26454)
@@ -61,4 +61,15 @@
     PS_ASSERT_PTR_NON_NULL(config, false);
 
+    if (!options->matchZPs) {
+	int num = psMetadataLookupS32(NULL, config->arguments, "INPUTS.NUM"); // Number of inputs
+	options->norm = psVectorAlloc(num, PS_TYPE_F32);
+	psVectorInit (options->norm, 0.0);
+
+	// XXX do I need to set this?
+	// options->sumExposure = sumExpTime;
+
+	return true;
+    }
+
     psArray *sourceLists = options->sourceLists; // Source lists for each input
     psVector *inputMask = options->inputMask; // Mask for inputs